The Impact of Different Coolant Additives on the Corrosion Rate and Heat Transfer Effectiveness of Radiator Materials

Abstract: This study investigates the impact of different coolant additives on both the corrosion rate and heat transfer performance of common radiator materials used in automotive cooling systems. Radiator efficiency and longevity depend significantly on coolant formulation, which governs thermal conductivity, pH stability, and corrosion protection. Four coolant types ethylene glycol-based, propylene glycol-based, hybrid organic acid technology (HOAT), and organic acid technology (OAT) were evaluated. Experiments were conducted using aluminum and copper radiator specimens under controlled thermal cycling. Corrosion rates were measured via weight-loss and electrochemical methods, while heat transfer coefficients were determined through steady-state heat exchange tests. Results indicate that OAT coolants exhibited superior corrosion inhibition, while HOAT coolants offered the highest thermal efficiency. The study provides engineering recommendations for selecting coolant formulations to balance corrosion control and heat transfer performance. Title: The Impact of Different Coolant Additives on the Corrosion Rate and Heat Transfer Effectiveness of Radiator Materials Author: Ebrahim Mohammad Almufarrej, Mohammad F. Kh. A. Alenezi International Journal of Mechanical and Industrial Technology ISSN 2348-7593 (Online) Vol. 13, Issue 2, October 2025 - March 2026 Page No: 4-8 Research Publish Journals Website: www.researchpublish.com Published Date: 23-October-2025 DOI: https://doi.org/10.5281/zenodo.17422120 Paper Download Link (Source) https://www.researchpublish.com/papers/the-impact-of-different-coolant-additives-on-the-corrosion-rate-and-heat-transfer-effectiveness-of-radiator-materials